After everything you've gone through with this, and assuming you still want to try and use the cooling function, maybe it's time to try some fans to circulate that "pocket" of cold you seem to be dealing with.
Here's an angled front view of the computer fans I found, as well a top view from behind the drawers. These pull air in from the gap below my bottom drawer and shoot it up the back giving a much better use of space than a traditional pass-through computer fan (IMO) and I got them cheap on Amazon.
I only had about a 4%RH variance to begin with, but these evened it out, top to bottom, front to back.
Might be worth a shot for you...
I like those fans! Can you post a link. How difficult was it to tap the power and bring it inside the box? I have access to an electrician at work I just want to know how much time I would be asking of him.
http://amzn.com/B000HRNCJW
The difference between the "computer fans" most guys talk about and these fans is how the air transfer happens.
These "blower" fans push air at 90 degrees from the air inlet, so they can be put tight in the bottom corner of your wineador.
Other fans need space on both sides and you have to sacrifice your layout to adapt.
I ran a cord up through the drain hole so I didn't have any drilling to do, but mine are New-Air 281 models. YMMV.
The fans I bought are 12VDC, and I power them from an old wall-wort type DC power supply. I tend to keep things like that instead of throwing them away, so I had a couple laying around. If you don't have one to use, they're cheap on Amazon or eBay. Really, there is nothing you'd need an electrician for, though. Feel free to reach out to me if you need help once you've got your components and maybe we can work through it together in a public thread so others can follow along!
(Maybe I'll just document my build, too, for good measure :eyebrow: )